Ok, here's the deal. I've had a small amp and a Squier bass and for the past year all i've done is "plug and play", you know? What are all those thingies with the knobs and stuff. I've looked around on the internet, but I can't find anywhere that explains what they are, and what they do? So i'm asking here...Oh, and what are those speaker things, do they need to be connected to something else (???). I'm absolutely clueless, all I have is a tine little practice amp and that's all I know about.